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Effect of metal ion of recombinant glucoamylase (rGA) activity.
| Name of metal | Relative activity of recombinant glucoamylase (rGA) | |
|---|---|---|
| Metal salt (1 mM) | Metal salt (5 mM) | |
| Control (H2O) | 1.00 | 1.00 |
| Na+ | 1.04 | 0.86∗ |
| K+ | 1.04 | 0.99 |
| Ca++ | 1.03 | 1.19∗ |
| Mg++ | 1.06∗ | 1.13∗ |
| Fe++ | 1.50∗ | 0.96 |
| Zn++ | 1.15∗ | 0.73∗ |
| Cu++ | 1.63∗ | 0.44∗ |
| Pb++ | 1.39∗ | 0.66∗ |
| Cd++ | 1.02 | 1.04 |
∗Having significant effect on activity of metal ion (p ≤ 0.05 by independent sample t-test).
